A081261 - OEIS

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A081261

Start with a(1)=4; apply 4 -> 665, 5 -> 56665, 6 -> 566665; iterate.

4, 6, 6, 5, 5, 6, 6, 6, 6, 5, 5, 6, 6, 6, 6, 5, 5, 6, 6, 6, 5, 5, 6, 6, 6, 5, 5, 6, 6, 6, 6, 5, 5, 6, 6, 6, 6, 5, 5, 6, 6, 6, 6, 5, 5, 6, 6, 6, 6, 5, 5, 6, 6, 6, 5, 5, 6, 6, 6, 5, 5, 6, 6, 6, 6, 5, 5, 6, 6, 6, 6, 5, 5, 6, 6, 6, 6, 5, 5, 6, 6, 6, 6, 5, 5, 6, 6, 6, 5, 5, 6, 6, 6, 5, 5, 6, 6, 6, 6, 5, 5, 6, 6, 6, 6

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

COMMENTS

a(n)= A081260(n) - A081260(n-1) (taking A081260(0) as equal to 0). Sum of first n terms = A081260(n).

LINKS

Table of n, a(n) for n=1..105.

EXAMPLE

4 -> 665 -> 56666556666556665 -> ...

CROSSREFS

Cf. A079000, A079948.

Sequence in context: A376426 A011227 A155907 * A251738 A249022 A270541

Adjacent sequences: A081258 A081259 A081260 * A081262 A081263 A081264

KEYWORD

easy,nonn

AUTHOR

Matthew Vandermast, Mar 14 2003

STATUS

approved